Update vendors and the tested Node version in the readme. [ci skip]

vendor/benchmark.js/benchmark.js

@@ -120,7 +120,7 @@
    * @static
    * @memberOf Benchmark
    * @param {Object} [context=root] The context object.
-   * @returns {Function} Returns the `Benchmark` function.
+   * @returns {Function} Returns a new `Benchmark` function.
    */
   function runInContext(context) {
     // exit early if unable to acquire lodash

vendor/qunit-extras/qunit-extras.js

@@ -391,6 +391,9 @@
 
     /*------------------------------------------------------------------------*/
 
+    // replace poisoned `raises` method
+    context.raises = QUnit.raises = QUnit['throws'] || QUnit.raises;
+
     // add logging extras
     if (isPhantomPage || !document) {